Question

hlo , solve upper question please​

Answer 1

holla dued please refer pic above .

Answer 2

Answer:

Explanation:

let V1 is the speed of p-wave = 8km/s

and V2 is the speed of s-wave=4km/s

t1 is the time taken by p-wave to reach the recorder.

t2 is the time taken by s-wave to reach the recorder.

because both travel same distance from the centre to the detector,

V1.t1 = V2t2

8.t1 = 4t2

2t1=t2--------------------------------(1)

given, t2 - t1 = 4min -------------------------------(2)

from eqns (1) and (2)

t1 = 4min and t2 = 8min

the distance b/w detector and centre is = 8*10^3*(4*240)m

= 1920 * 10^3 m

=1920 km